Double-clip type turbine center line-type butterfly valve

Abstract

The utility model discloses a wafer type turbine center line-type butterfly valve which comprises a valve body, a valve seat, a valve seat clamping sleeve, a valve seat O-shaped ring, a valve plate, a steel sleeve, a valve rod, a shaft sleeve, a valve rod O-shaped ring, a turbine box, an outer hexagon screw, a spring gasket, a gasket, a valve cover O-shaped ring, a hoop, a valve cover and an inner hexagon screw. An upper shaft hole and a lower shaft hole of the valve seat are coaxial with an upper shaft hole and a lower shaft hole of the valve body, the valve seat is a novel valve seat, the valve seat can be suitable for pipeline flanges of series I and series II of DN300 or above in GB / T9124.1-2019 Part 1 of Steel Pipe Flanges: PN series, and when a wafer type turbine center line butterfly valve is used, a flange special for the butterfly valve does not need to be specially used.

Description

Technical Field

[0001] The utility model belongs to the technical field of valves and relates to a wafer-type turbine centerline butterfly valve. Background Art

[0002] For the existing wafer-type turbine centerline butterfly valves with specifications above DN300, if the series II flange in GB / T9124.1-2019 "Steel Pipe Flanges Part 1: PN Series" is selected during use, it is necessary to install and use a special flange for butterfly valves, and a special flange for butterfly valves needs to be added in the pipeline. Utility Model Content

[0003] The purpose of the utility model is to provide a wafer-type turbine centerline butterfly valve, which has a simple structure, novel and reasonable design, and is suitable for series I and series II pipeline flanges above DN300 in GB / T9124.1-2019 "Steel Pipe Flanges Part 1: PN Series", without the need to use special flanges for butterfly valves.

[0004] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a wafer-type turbine centerline butterfly valve, comprising a valve body (1), a valve seat (2), a valve seat sleeve (3), a valve seat O-ring (4), a valve plate (5), a steel sleeve (6), a valve stem (7), a shaft sleeve (8), a valve stem O-ring (9), a turbine housing (10), an external hexagonal screw (11), a spring gasket (12), a gasket (13), a valve cover O-ring (14), a clamp (15), and a valve cover (16), wherein a valve seat (2) is installed inside the valve body (1), and the valve seat (2) is coaxial with the valve body (1), the upper and lower axial holes of the valve seat (2) are coaxial with the upper and lower axial holes of the valve body (1), the valve seat sleeve (3) is located in the upper and lower ports of the valve seat (2), the valve seat sleeve (3) and the valve seat (2) are vulcanized into one, and the valve seat O-ring (4) is located The valve plate (5) is located in the groove of the valve seat sleeve (3), and the valve plate (5) is coaxial with the upper and lower shaft holes of the valve seat (2) and the upper and lower shaft holes of the valve body (1). A valve stem (7) and a shaft sleeve (8) are arranged in the shaft hole. The steel sleeve (6) is located inside the lower shaft hole of the valve body (1). A clamp (15) is arranged at the groove at the lower end of the valve stem (7) to prevent the valve stem (7) from blowing out. A valve cover (16) is arranged at the bottom of the valve body and is sealed by a valve cover O-ring (14). A turbine box (10) is arranged on the upper flange of the valve body (1) and is fixed by an external hexagon screw (11), a spring washer (12) and a washer (13). During use, the hand wheel on the turbine box (10) is turned to drive the valve stem (7) to rotate, and then the valve stem (7) drives the valve plate (5) to rotate, squeezing the valve seat (2) to achieve valve switch sealing. The outer diameter of the valve seat is increased, so that the sealing strips on both ends of the valve seat form a good sealing environment with the series II flange in GB / T9124.1-2019 "Steel Pipe Flanges Part 1: PN Series". Figure 3, indicating that when the conventional butterfly valve is matched with the series II flange in GB / T9124.1-2019 "Steel Pipe Flanges Part 1: PN Series" and the seal, the butterfly valve seat seal strip and the flange are completely overlapped and pressed, and the butterfly valve can be used normally with a seal; Figure 4 , indicating that when the conventional butterfly valve seat is sealed with the series II flange in GB / T9124.1-2019 "Steel Pipe Flanges Part 1: PN Series", the valve seat sealing convex part and the flange are not completely overlapped and pressed, affecting the use of the butterfly valve seal.

[0005] Compared with the prior art, the utility model has the following beneficial effects: the utility model has small size, light weight and easy installation; it is suitable for series I and series II pipeline flanges above DN300 in GB / T9124.1-2019 "Steel Pipe Flanges Part 1: PN Series", and does not require the use of special flanges for butterfly valves. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0007] Figure 2 It is a schematic diagram of the conventional overall structure.

[0008] Figure 3 For this utility model Figure 1 A partial enlarged view of point A in the middle.

[0009] Figure 4 for Figure 2 A partial enlarged view of point B in the middle.

[0010] In the figure: valve body (1), valve seat (2), valve seat sleeve (3), valve seat O-ring (4), valve plate (5), steel sleeve (6), valve stem (7), shaft sleeve (8), valve stem O-ring (9), turbine housing (10), hexagonal screw (11), spring washer (12), washer (13), valve cover O-ring (14), clamp (15), valve cover (16). DETAILED DESCRIPTION

[0011] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0012] See also Figure 1The utility model provides an embodiment: a valve seat (2) is installed inside the valve body (1), and the valve seat (2) is coaxial with the valve body (1), the upper and lower axial holes of the valve seat (2) are coaxial with the upper and lower axial holes of the valve body (1), the valve seat sleeve (3) is located in the upper and lower ports of the valve seat (2), the valve seat sleeve (3) and the valve seat (2) are vulcanized into one, the valve seat O-ring (4) is located in the groove of the valve seat sleeve (3), the valve plate (5) is located in the valve seat (2), the axial hole of the valve plate (5) is coaxial with the upper and lower axial holes of the valve seat (2) and the upper and lower axial holes of the valve body (1), and a valve stem (7) and a sleeve are provided in the axial hole. (8), the steel sleeve (6) is located inside the lower shaft hole of the valve body (1), a clamp (15) is provided at the groove at the lower end of the valve stem (7) to prevent the valve stem (7) from blowing out, a valve cover (16) is provided at the bottom of the valve body, and is sealed by a valve cover O-ring (14), and a turbine box (10) is provided on the flange of the valve body (1), which is fastened by an external hexagon screw (11), a spring washer (12), and a washer (13). During use, the hand wheel on the turbine box (10) is turned to drive the valve stem (7) to rotate, and then the valve stem (7) drives the valve plate (5) to rotate, squeezing the valve seat (2), thereby achieving valve switch sealing.

[0013] The valve seat (2) is a new type of valve seat, which is suitable for series I and series II pipeline flanges above DN300 in GB / T9124.1-2019 "Steel Pipe Flanges Part 1: PN Series". When using a wafer-type turbine centerline butterfly valve, the sealing convex part of the valve seat (2) is completely overlapped and pressed with the II pipeline flange, and there is no need to use a special flange for butterfly valves, such as Figure 1 and Figure 3 As shown; when a conventional butterfly valve is used with a II pipe flange, Figure 2 and Figure 4 As shown, the sealing convex part of the valve seat (2) cannot be completely overlapped and pressed against the II pipe flange, and a special flange for butterfly valves with a smaller inner diameter needs to be used.

[0014] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A wafer-type turbine centerline butterfly valve, characterized in that: The invention comprises a valve body (1), a valve seat (2), a valve seat sleeve (3), a valve seat O-ring (4), a valve plate (5), a steel sleeve (6), a valve stem (7), a shaft sleeve (8), a valve stem O-ring (9), a turbine housing (10), an external hexagon screw (11), a spring washer (12), a gasket (13), a valve cover O-ring (14), a clamp (15), and a valve cover (16). The valve body (1) is provided with a valve seat (2), and the valve seat (2) is coaxial with the valve body (1). The upper and lower axial holes of the valve seat (2) are coaxial with the upper and lower axial holes of the valve body (1). The valve seat sleeve (3) is located in the upper and lower ports of the valve seat (2). The valve seat sleeve (3) and the valve seat (2) are vulcanized into one. The valve seat O-ring (4) is located in the groove of the valve seat sleeve (3). The valve plate (5 ) is located in the valve seat (2), the valve plate (5) axial hole is coaxial with the upper and lower axial holes of the valve seat (2) and the upper and lower axial holes of the valve body (1), the axial hole is provided with a valve stem (7) and a shaft sleeve (8), the steel sleeve (6) is located inside the lower axial hole of the valve body (1), a clamp (15) is provided at the groove at the lower end of the valve stem (7) to prevent the valve stem (7) from blowing out, a valve cover (16) is provided at the bottom of the valve body, and is sealed by a valve cover O-ring (14), a turbine box (10) is provided on the upper flange of the valve body (1), and is tightened by an external hexagon screw (11), a spring washer (12), and a washer (13), during use, the hand wheel on the turbine box (10) is turned to drive the valve stem (7) to rotate, and then the valve stem (7) drives the valve plate (5) to rotate, squeezing the valve seat (2), thereby realizing the valve switch sealing.

2. According to claim 1, a wafer-type turbine centerline butterfly valve is characterized in that: The valve seat (2) is suitable for series I and series II pipe flanges with a diameter of DN300 or above in accordance with GB / T9124.1-2019 "Steel Pipe Flanges Part 1: PN Series".

3. The wafer-type turbine centerline butterfly valve according to claim 1 is characterized in that: The valve seat (2) is made of EPDM material.

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